TY  - BOOK
AU  - Macan,T.T.
TI  - Freshwater Ecology
T2  - "A Halsted Press book."
SN  - 0582446244
U1  - 574.5/2632 
PY  - 1963///
CY  - London
PB  - Longman
KW  - Freshwater ecology
ER  -